[INFO] updating cached repository timvisee/ffsend
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/timvisee/ffsend
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/timvisee/ffsend" "work/ex/beta-1.38-1/sources/1.37.0/gh/timvisee/ffsend"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/timvisee/ffsend'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/timvisee/ffsend" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/timvisee/ffsend"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/timvisee/ffsend'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 12503d0d215c7c083d8a175cff0b94f721fec7ab
[INFO] sha for GitHub repo timvisee/ffsend: 12503d0d215c7c083d8a175cff0b94f721fec7ab
[INFO] validating manifest of timvisee/ffsend on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of timvisee/ffsend on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing timvisee/ffsend
[INFO] finished frobbing timvisee/ffsend
[INFO] frobbed toml for timvisee/ffsend written to work/ex/beta-1.38-1/sources/1.37.0/gh/timvisee/ffsend/Cargo.toml
[INFO] started frobbing timvisee/ffsend
[INFO] finished frobbing timvisee/ffsend
[INFO] frobbed toml for timvisee/ffsend written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/timvisee/ffsend/Cargo.toml
[INFO] crate timvisee/ffsend already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing timvisee/ffsend against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/timvisee/ffsend:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] ae989c05270f81b93e36d7a8b58deaa41cc2157d43a202d94cf37c7dc4bd7cc5
[INFO] running `"docker" "start" "-a" "ae989c05270f81b93e36d7a8b58deaa41cc2157d43a202d94cf37c7dc4bd7cc5"`
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling winapi v0.3.7
[INFO] [stderr]    Compiling derive_builder v0.6.0
[INFO] [stderr]    Compiling checked_int_cast v1.0.0
[INFO] [stderr]    Compiling ffsend v0.2.46 (/opt/crater/workdir)
[INFO] [stderr]    Compiling version-compare v0.0.6
[INFO] [stderr]    Compiling version-compare v0.0.8
[INFO] [stderr]    Compiling open v1.2.2
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr] warning[E0621]: explicit lifetime required in the type of `other`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/version-compare-0.0.8/src/version.rs:312:58
[INFO] [stderr]     |
[INFO] [stderr] 310 |     pub fn compare(&self, other: &Version) -> CompOp {
[INFO] [stderr]     |                                  -------- help: add explicit lifetime `'a` to the type of `other`: `&version::Version<'a>`
[INFO] [stderr] 311 |         // Compare the versions with their peekable iterators
[INFO] [stderr] 312 |         Self::compare_iter(self.parts.iter().peekable(), other.parts.iter().peekable())
[INFO] [stderr]     |                                                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ lifetime `'a` required
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]    Compiling crossterm_utils v0.2.3
[INFO] [stderr]    Compiling rand v0.5.6
[INFO] [stderr]    Compiling xattr v0.2.2
[INFO] [stderr] warning[E0621]: explicit lifetime required in the type of `other`
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/version-compare-0.0.6/src/version.rs:308:13
[INFO] [stderr]     |
[INFO] [stderr] 304 |     pub fn compare(&self, other: &Version) -> CompOp {
[INFO] [stderr]     |                                  -------- help: add explicit lifetime `'a` to the type of `other`: `&version::Version<'a>`
[INFO] [stderr] ...
[INFO] [stderr] 308 |             other.parts.iter().peekable(),
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ lifetime `'a` required
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]    Compiling dirs-sys v0.3.3
[INFO] [stderr]    Compiling fs2 v0.4.3
[INFO] [stderr]    Compiling rpassword v3.0.2
[INFO] [stderr]    Compiling syn v0.13.11
[INFO] [stderr]    Compiling openssl-sys v0.9.47
[INFO] [stderr]    Compiling num-traits v0.1.43
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling pbr v1.0.1
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling qrcode v0.10.0
[INFO] [stderr]    Compiling tar v0.4.26
[INFO] [stderr]    Compiling crossterm_style v0.3.3
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling directories v2.0.1
[INFO] [stderr]    Compiling aho-corasick v0.7.3
[INFO] [stderr]    Compiling csv-core v0.1.5
[INFO] [stderr]    Compiling miniz_oxide_c_api v0.2.1
[INFO] [stderr]    Compiling crypto-mac v0.7.0
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling cookie v0.12.0
[INFO] [stderr]    Compiling hyper v0.10.16
[INFO] [stderr]    Compiling urlshortener v0.10.0
[INFO] [stderr]    Compiling cgmath v0.16.1
[INFO] [stderr]    Compiling openssl v0.10.23
[INFO] [stderr]    Compiling tokio-io v0.1.12
[INFO] [stderr]    Compiling tokio-buf v0.1.1
[INFO] [stderr]    Compiling string v0.2.0
[INFO] [stderr]    Compiling http v0.1.17
[INFO] [stderr]    Compiling crossterm v0.9.5
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling tokio-threadpool v0.1.14
[INFO] [stderr] error: Could not compile `syn`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name syn /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-0.13.11/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts --crate-type lib --emit=dep-info,metadata,link -C debuginfo=2 --cfg 'feature="clone-impls"' --cfg 'feature="default"' --cfg 'feature="derive"' --cfg 'feature="extra-traits"' --cfg 'feature="full"' --cfg 'feature="parsing"' --cfg 'feature="printing"' --cfg 'feature="proc-macro"' --cfg 'feature="quote"' -C metadata=af7dcde06d1ff545 -C extra-filename=-af7dcde06d1ff545 --out-dir /opt/crater/target/debug/deps -L dependency=/opt/crater/target/debug/deps --extern proc_macro2=/opt/crater/target/debug/deps/libproc_macro2-14b676765bf4bf56.rmeta --extern quote=/opt/crater/target/debug/deps/libquote-0cab5706397d90a6.rmeta --extern unicode_xid=/opt/crater/target/debug/deps/libunicode_xid-8d0f27a2dfe05cf6.rmeta --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "ae989c05270f81b93e36d7a8b58deaa41cc2157d43a202d94cf37c7dc4bd7cc5"`
[INFO] running `"docker" "rm" "-f" "ae989c05270f81b93e36d7a8b58deaa41cc2157d43a202d94cf37c7dc4bd7cc5"`
[INFO] [stdout] ae989c05270f81b93e36d7a8b58deaa41cc2157d43a202d94cf37c7dc4bd7cc5